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1 module dmd.GotoCaseStatement;
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2
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3 import dmd.Statement;
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4 import dmd.Expression;
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5 import dmd.CaseStatement;
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6 import dmd.IRState;
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7 import dmd.Scope;
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8 import dmd.Loc;
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9 import dmd.InterState;
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10 import dmd.OutBuffer;
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11 import dmd.HdrGenState;
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12 import dmd.BE;
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13 import dmd.WANT;
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14
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15 class GotoCaseStatement : Statement
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16 {
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17 Expression exp; // NULL, or which case to goto
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18 CaseStatement cs; // case statement it resolves to
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19
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20 this(Loc loc, Expression exp)
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21 {
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22 super(loc);
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23 cs = null;
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24 this.exp = exp;
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25 }
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26
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27 override Statement syntaxCopy()
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28 {
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29 Expression e = exp ? exp.syntaxCopy() : null;
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30 GotoCaseStatement s = new GotoCaseStatement(loc, e);
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31 return s;
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32 }
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33
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34 override Statement semantic(Scope sc)
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35 {
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36 if (exp)
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37 exp = exp.semantic(sc);
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38
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39 if (!sc.sw)
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40 error("goto case not in switch statement");
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41 else
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42 {
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43 sc.sw.gotoCases.push(cast(void*)this);
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44 if (exp)
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45 {
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46 exp = exp.implicitCastTo(sc, sc.sw.condition.type);
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47 exp = exp.optimize(WANTvalue);
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48 }
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49 }
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50 return this;
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51 }
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52
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53 override Expression interpret(InterState istate)
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54 {
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55 assert(false);
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56 }
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57
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58 override BE blockExit()
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59 {
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60 return BEgoto;
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61 }
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62
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63 override void toCBuffer(OutBuffer buf, HdrGenState* hgs)
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64 {
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65 buf.writestring("goto case");
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66 if (exp)
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67 {
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68 buf.writebyte(' ');
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69 exp.toCBuffer(buf, hgs);
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70 }
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71 buf.writebyte(';');
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72 buf.writenl();
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73 }
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74
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75 override void toIR(IRState* irs)
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76 {
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77 assert(false);
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78 }
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72
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79 }
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